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Installing the GNU C Library
****************************
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Before you do anything else, you should read the FAQ at
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<http://sourceware.org/glibc/wiki/FAQ>. It answers common questions and
describes problems you may experience with compilation and installation.
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Features can be added to the GNU C Library via "add-on" bundles.
These are separate tar files, which you unpack into the top level of the
source tree. Then you give 'configure' the '--enable-add-ons' option to
activate them, and they will be compiled into the library.
You will need recent versions of several GNU tools: definitely GCC
and GNU Make, and possibly others. *Note Tools for Compilation::,
below.
Configuring and compiling the GNU C Library
===========================================
The GNU C Library cannot be compiled in the source directory. You must
build it in a separate build directory. For example, if you have
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unpacked the GNU C Library sources in '/src/gnu/glibc-VERSION', create a
directory '/src/gnu/glibc-build' to put the object files in. This
allows removing the whole build directory in case an error occurs, which
is the safest way to get a fresh start and should always be done.
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From your object directory, run the shell script 'configure' located
at the top level of the source tree. In the scenario above, you'd type
$ ../glibc-VERSION/configure ARGS...
Please note that even though you're building in a separate build
directory, the compilation may need to create or modify files and
directories in the source directory.
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'configure' takes many options, but the only one that is usually
mandatory is '--prefix'. This option tells 'configure' where you want
the GNU C Library installed. This defaults to '/usr/local', but the
normal setting to install as the standard system library is
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'--prefix=/usr' for GNU/Linux systems and '--prefix=' (an empty prefix)
for GNU/Hurd systems.
It may also be useful to set the CC and CFLAGS variables in the
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environment when running 'configure'. CC selects the C compiler that
will be used, and CFLAGS sets optimization options for the compiler.
The following list describes all of the available options for
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'configure':
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'--prefix=DIRECTORY'
Install machine-independent data files in subdirectories of
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'DIRECTORY'. The default is to install in '/usr/local'.
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'--exec-prefix=DIRECTORY'
Install the library and other machine-dependent files in
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subdirectories of 'DIRECTORY'. The default is to the '--prefix'
directory if that option is specified, or '/usr/local' otherwise.
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'--with-headers=DIRECTORY'
Look for kernel header files in DIRECTORY, not '/usr/include'. The
GNU C Library needs information from the kernel's header files
describing the interface to the kernel. The GNU C Library will
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normally look in '/usr/include' for them, but if you specify this
option, it will look in DIRECTORY instead.
This option is primarily of use on a system where the headers in
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'/usr/include' come from an older version of the GNU C Library.
Conflicts can occasionally happen in this case. You can also use
this option if you want to compile the GNU C Library with a newer
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set of kernel headers than the ones found in '/usr/include'.
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'--enable-add-ons[=LIST]'
Specify add-on packages to include in the build. If this option is
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specified with no list, it enables all the add-on packages it finds
in the main source directory; this is the default behavior. You
may specify an explicit list of add-ons to use in LIST, separated
by spaces or commas (if you use spaces, remember to quote them from
the shell). Each add-on in LIST can be an absolute directory name
or can be a directory name relative to the main source directory,
or relative to the build directory (that is, the current working
directory). For example,
'--enable-add-ons=nptl,../glibc-libidn-VERSION'.
'--enable-kernel=VERSION'
This option is currently only useful on GNU/Linux systems. The
VERSION parameter should have the form X.Y.Z and describes the
smallest version of the Linux kernel the generated library is
expected to support. The higher the VERSION number is, the less
compatibility code is added, and the faster the code gets.
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'--with-binutils=DIRECTORY'
Use the binutils (assembler and linker) in 'DIRECTORY', not the
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
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ones the C compiler would default to. You can use this option if
the default binutils on your system cannot deal with all the
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constructs in the GNU C Library. In that case, 'configure' will
detect the problem and suppress these constructs, so that the
library will still be usable, but functionality may be lost--for
example, you can't build a shared libc with old binutils.
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'--without-fp'
Use this option if your computer lacks hardware floating-point
support and your operating system does not emulate an FPU.
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'--disable-shared'
Don't build shared libraries even if it is possible. Not all
systems support shared libraries; you need ELF support and
(currently) the GNU linker.
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'--disable-profile'
Don't build libraries with profiling information. You may want to
use this option if you don't plan to do profiling.
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'--enable-static-nss'
Compile static versions of the NSS (Name Service Switch) libraries.
This is not recommended because it defeats the purpose of NSS; a
program linked statically with the NSS libraries cannot be
dynamically reconfigured to use a different name database.
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'--without-tls'
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
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By default the C library is built with support for thread-local
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storage if the used tools support it. By using '--without-tls'
this can be prevented though there generally is no reason since it
creates compatibility problems.
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'--enable-hardcoded-path-in-tests'
By default, dynamic tests are linked to run with the installed C
library. This option hardcodes the newly built C library path in
dynamic tests so that they can be invoked directly.
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'--enable-lock-elision=yes'
Enable lock elision for pthread mutexes by default.
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'--enable-pt_chown'
The file 'pt_chown' is a helper binary for 'grantpt' (*note
Pseudo-Terminals: Allocation.) that is installed setuid root to fix
up pseudo-terminal ownership. It is not built by default because
systems using the Linux kernel are commonly built with the 'devpts'
filesystem enabled and mounted at '/dev/pts', which manages
pseudo-terminal ownership automatically. By using
'--enable-pt_chown', you may build 'pt_chown' and install it setuid
and owned by 'root'. The use of 'pt_chown' introduces additional
security risks to the system and you should enable it only if you
understand and accept those risks.
'--disable-werror'
By default, the GNU C Library is built with '-Werror'. If you wish
Use -Werror by default, add --disable-werror. As discussed starting at <https://sourceware.org/ml/libc-alpha/2014-11/msg00323.html>, this patch makes the glibc build use -Werror by default to avoid accidentally adding new warnings to the build. The configure option --disable-werror can be used to disable this. -Wno-error=undef is temporarily used because the build isn't clean regarding -Wundef warnings. The idea is that once the remaining -Wundef warnings have been cleaned up (in at least one configuration), -Wno-error=undef will be removed. I get a clean build and test on x86_64 (GCC 4.9 branch) with this patch. The expectation is that this may well break the build for some other configurations, and people seeing such breakage should make appropriate fixes to fix or suppress the warnings for their configurations. In some cases that may involve using pragmas as the right fix (I think that will be right for the -Wno-inline issue for MIPS I referred to in <https://sourceware.org/ml/libc-alpha/2012-11/msg00798.html>, for example), in some cases -Wno-error in sysdeps makefiles (__restore_rt in MIPS sigaction, for example), in some cases substantive fixes for the warnings. Note that if, with a view to listing all the warnings then fixing them all, you just look for "warning:" in output from building and testing with --disable-werror, you'll see lots of warnings from the linker about functions such as tmpnam. Those warnings can be ignored - only compiler warnings are relevant to -Werror, not linker warnings. * configure.ac (--disable-werror): New configure option. (enable_werror): New AC_SUBST. * configure: Regenerated. * config.make.in (enable-werror): New variable. * Makeconfig [$(enable-werror) = yes] (+gccwarn): Add -Werror -Wno-error=undef. (+gccwarn-c): Do not use -Werror=implicit-function-declaration. * manual/install.texi (Configuring and compiling): Document --disable-werror. * INSTALL: Regenerated. * debug/Makefile (CFLAGS-tst-chk1.c): Add -Wno-error. (CFLAGS-tst-chk2.c): Likewise. (CFLAGS-tst-chk3.c): Likewise. (CFLAGS-tst-chk4.cc): Likewise. (CFLAGS-tst-chk5.cc): Likewise. (CFLAGS-tst-chk6.cc): Likewise. (CFLAGS-tst-lfschk1.c): Likewise. (CFLAGS-tst-lfschk2.c): Likewise. (CFLAGS-tst-lfschk3.c): Likewise. (CFLAGS-tst-lfschk4.cc): Likewise. (CFLAGS-tst-lfschk5.cc): Likewise. (CFLAGS-tst-lfschk6.cc): Likewise.
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to build without this option (for example, if building with a newer
version of GCC than this version of the GNU C Library was tested
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with, so new warnings cause the build with '-Werror' to fail), you
can configure with '--disable-werror'.
'--build=BUILD-SYSTEM'
'--host=HOST-SYSTEM'
These options are for cross-compiling. If you specify both options
and BUILD-SYSTEM is different from HOST-SYSTEM, 'configure' will
prepare to cross-compile the GNU C Library from BUILD-SYSTEM to be
used on HOST-SYSTEM. You'll probably need the '--with-headers'
option too, and you may have to override CONFIGURE's selection of
the compiler and/or binutils.
If you only specify '--host', 'configure' will prepare for a native
compile but use what you specify instead of guessing what your
system is. This is most useful to change the CPU submodel. For
example, if 'configure' guesses your machine as 'i686-pc-linux-gnu'
but you want to compile a library for 586es, give
'--host=i586-pc-linux-gnu' or just '--host=i586-linux' and add the
appropriate compiler flags ('-mcpu=i586' will do the trick) to
CFLAGS.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
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If you specify just '--build', 'configure' will get confused.
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'--with-pkgversion=VERSION'
Specify a description, possibly including a build number or build
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date, of the binaries being built, to be included in '--version'
output from programs installed with the GNU C Library. For
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example, '--with-pkgversion='FooBar GNU/Linux glibc build 123''.
The default value is 'GNU libc'.
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'--with-bugurl=URL'
Specify the URL that users should visit if they wish to report a
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bug, to be included in '--help' output from programs installed with
the GNU C Library. The default value refers to the main
bug-reporting information for the GNU C Library.
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To build the library and related programs, type 'make'. This will
produce a lot of output, some of which may look like errors from 'make'
but isn't. Look for error messages from 'make' containing '***'. Those
indicate that something is seriously wrong.
The compilation process can take a long time, depending on the
configuration and the speed of your machine. Some complex modules may
take a very long time to compile, as much as several minutes on slower
machines. Do not panic if the compiler appears to hang.
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If you want to run a parallel make, simply pass the '-j' option with
an appropriate numeric parameter to 'make'. You need a recent GNU
'make' version, though.
To build and run test programs which exercise some of the library
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facilities, type 'make check'. If it does not complete successfully, do
not use the built library, and report a bug after verifying that the
problem is not already known. *Note Reporting Bugs::, for instructions
on reporting bugs. Note that some of the tests assume they are not
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being run by 'root'. We recommend you compile and test the GNU C
Library as an unprivileged user.
Before reporting bugs make sure there is no problem with your system.
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
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The tests (and later installation) use some pre-existing files of the
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system such as '/etc/passwd', '/etc/nsswitch.conf' and others. These
files must all contain correct and sensible content.
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Normally, 'make check' will run all the tests before reporting all
Do not terminate default test runs on test failure. This patch is an updated version of <https://sourceware.org/ml/libc-alpha/2014-01/msg00198.html> and <https://sourceware.org/ml/libc-alpha/2014-03/msg00180.html>. Normal practice for software testsuites is that rather than terminating immediately when a test fails, they continue running and report at the end on how many tests passed or failed. The principle behind the glibc testsuite stopping on failure was probably that the expected state is no failures and so any failure indicates a problem such as miscompilation. In practice, while this is fairly close to true for native testing on x86_64 and x86 (kernel bugs and race conditions can still cause intermittent failures), it's less likely to be the case on other platforms, and so people testing glibc run the testsuite with "make -k" and then examine the logs to determine whether the failures are what they expect to fail on that platform, possibly with some automation for the comparison. This patch switches the glibc testsuite to the normal convention of not stopping on failure - unless you use stop-on-test-failure=y, in which case it behaves essentially as it did before (and does not generate overall test summaries on failure). Instead, the summary tests.sum may contain tests that FAILed. At the end of the test run, any FAIL or ERROR lines from tests.sum are printed, and then it exits with error status if there were any such lines. In addition, build failures will also cause the test run to stop - this has the justification that those *do* indicate serious problems that should be promptly fixed and aren't generally hard to fix (but apart from that, avoiding the build stopping on those failures seems harder). Note that unlike the previous patches in this series, this *does* require people with automation around testing glibc to change their processes - either to start using tests.sum / xtests.sum to track failures and compare them with expectations (with or without also using "make -k" and examining "make" logs to identify build failures), or else to use stop-on-test-failure=y and ignore the new tests.sum / xtests.sum mechanism. (If all you check is the exit status from "make check", no changes are needed unless you want to avoid test runs continuing after the first failure.) Tested x86_64. * scripts/evaluate-test.sh: Handle fourth argument to determine whether test run should stop on failure. * Makeconfig (stop-on-test-failure): New variable. (evaluate-test): Pass fourth argument to evaluate-test.sh based on $(stop-on-test-failure). * Makefile (tests): Give a summary of results from testing and exit with failure status if they include an ERROR or FAIL. (xtests): Likewise. * manual/install.texi (Configuring and compiling): Mention stop-on-test-failure=y. * INSTALL: Regenerated.
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problems found and exiting with error status if any problems occurred.
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You can specify 'stop-on-test-failure=y' when running 'make check' to
Do not terminate default test runs on test failure. This patch is an updated version of <https://sourceware.org/ml/libc-alpha/2014-01/msg00198.html> and <https://sourceware.org/ml/libc-alpha/2014-03/msg00180.html>. Normal practice for software testsuites is that rather than terminating immediately when a test fails, they continue running and report at the end on how many tests passed or failed. The principle behind the glibc testsuite stopping on failure was probably that the expected state is no failures and so any failure indicates a problem such as miscompilation. In practice, while this is fairly close to true for native testing on x86_64 and x86 (kernel bugs and race conditions can still cause intermittent failures), it's less likely to be the case on other platforms, and so people testing glibc run the testsuite with "make -k" and then examine the logs to determine whether the failures are what they expect to fail on that platform, possibly with some automation for the comparison. This patch switches the glibc testsuite to the normal convention of not stopping on failure - unless you use stop-on-test-failure=y, in which case it behaves essentially as it did before (and does not generate overall test summaries on failure). Instead, the summary tests.sum may contain tests that FAILed. At the end of the test run, any FAIL or ERROR lines from tests.sum are printed, and then it exits with error status if there were any such lines. In addition, build failures will also cause the test run to stop - this has the justification that those *do* indicate serious problems that should be promptly fixed and aren't generally hard to fix (but apart from that, avoiding the build stopping on those failures seems harder). Note that unlike the previous patches in this series, this *does* require people with automation around testing glibc to change their processes - either to start using tests.sum / xtests.sum to track failures and compare them with expectations (with or without also using "make -k" and examining "make" logs to identify build failures), or else to use stop-on-test-failure=y and ignore the new tests.sum / xtests.sum mechanism. (If all you check is the exit status from "make check", no changes are needed unless you want to avoid test runs continuing after the first failure.) Tested x86_64. * scripts/evaluate-test.sh: Handle fourth argument to determine whether test run should stop on failure. * Makeconfig (stop-on-test-failure): New variable. (evaluate-test): Pass fourth argument to evaluate-test.sh based on $(stop-on-test-failure). * Makefile (tests): Give a summary of results from testing and exit with failure status if they include an ERROR or FAIL. (xtests): Likewise. * manual/install.texi (Configuring and compiling): Mention stop-on-test-failure=y. * INSTALL: Regenerated.
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make the test run stop and exit with an error status immediately when a
failure occurs.
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To format the 'GNU C Library Reference Manual' for printing, type
'make dvi'. You need a working TeX installation to do this. The
distribution builds the on-line formatted version of the manual, as Info
files, as part of the build process. You can build them manually with
'make info'.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
2000-03-10 17:36:06 +08:00
The library has a number of special-purpose configuration parameters
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which you can find in 'Makeconfig'. These can be overwritten with the
file 'configparms'. To change them, create a 'configparms' in your
build directory and add values as appropriate for your system. The file
is included and parsed by 'make' and has to follow the conventions for
makefiles.
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It is easy to configure the GNU C Library for cross-compilation by
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setting a few variables in 'configparms'. Set 'CC' to the
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cross-compiler for the target you configured the library for; it is
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important to use this same 'CC' value when running 'configure', like
this: 'CC=TARGET-gcc configure TARGET'. Set 'BUILD_CC' to the compiler
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
2002-04-06 09:45:15 +08:00
to use for programs run on the build system as part of compiling the
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library. You may need to set 'AR' to cross-compiling versions of 'ar'
if the native tools are not configured to work with object files for the
target you configured for. When cross-compiling the GNU C Library, it
may be tested using 'make check
2012-10-26 03:17:45 +08:00
test-wrapper="SRCDIR/scripts/cross-test-ssh.sh HOSTNAME"', where SRCDIR
is the absolute directory name for the main source directory and
HOSTNAME is the host name of a system that can run the newly built
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binaries of the GNU C Library. The source and build directories must be
visible at the same locations on both the build system and HOSTNAME.
2000-03-10 17:36:06 +08:00
2015-01-21 11:25:38 +08:00
In general, when testing the GNU C Library, 'test-wrapper' may be set
to the name and arguments of any program to run newly built binaries.
This program must preserve the arguments to the binary being run, its
Don't require test wrappers to preserve environment variables, use more consistent environment. One wart in the original support for test wrappers for cross testing, as noted in <https://sourceware.org/ml/libc-alpha/2012-10/msg00722.html>, is the requirement for test wrappers to pass a poorly-defined set of environment variables from the build system to the system running the glibc under test. Although some variables are passed explicitly via $(test-wrapper-env), including LD_* variables that simply can't be passed implicitly because of the side effects they'd have on the build system's dynamic linker, others are passed implicitly, including variables such as GCONV_PATH and LOCPATH that could potentially affect the build system's libc (so effectively relying on any such effects not breaking the wrappers). In addition, the code in cross-test-ssh.sh for preserving environment variables is fragile (it depends on how bash formats a list of exported variables, and could well break for multi-line variable definitions where the contents contain things looking like other variable definitions). This patch moves to explicitly passing environment variables via $(test-wrapper-env). Makefile variables that previously used $(test-wrapper) are split up into -before-env and -after-env parts that can be passed separately to the various .sh files used in testing, so those files can then insert environment settings between the two parts. The common default environment settings in make-test-out are made into a separate makefile variable that can also be passed to scripts, rather than many scripts duplicating those settings (for testing an installed glibc, it is desirable to have the GCONV_PATH setting on just one place, so just that one place needs to support it pointing to an installed sysroot instead of the build tree). The default settings are included in the variables such as $(test-program-prefix), so that if tests do not need any non-default settings they can continue to use single variables rather than the split-up variables. Although this patch cleans up LC_ALL=C settings (that being part of the common defaults), various LANG=C and LANGUAGE=C settings remain. Those are generally unnecessary and I propose a subsequent cleanup to remove them. LC_ALL takes precedence over LANG, and while LANGUAGE takes precedence over LC_ALL, it only does so for settings other than LC_ALL=C. So LC_ALL=C on its own is sufficient to ensure the C locale, and anything that gets LC_ALL=C does not need the other settings. While preparing this patch I noticed some tests with .sh files that appeared to do nothing beyond what the generic makefile support for tests can do (localedata/tst-wctype.sh - the makefiles support -ENV variables and .input files - and localedata/tst-mbswcs.sh - just runs five tests that could be run individually from the makefile). So I propose another subsequent cleanup to move those to using the generic support instead of special .sh files. Tested x86_64 (native) and powerpc32 (cross). * Makeconfig (run-program-env): New variable. (run-program-prefix-before-env): Likewise. (run-program-prefix-after-env): Likewise. (run-program-prefix): Define in terms of new variables. (built-program-cmd-before-env): New variable. (built-program-cmd-after-env): Likewise. (built-program-cmd): Define in terms of new variables. (test-program-prefix-before-env): New variable. (test-program-prefix-after-env): Likewise. (test-program-prefix): Define in terms of new variables. (test-program-cmd-before-env): New variable. (test-program-cmd-after-env): Likewise. (test-program-cmd): Define in terms of new variables. * Rules (make-test-out): Use $(run-program-env). * scripts/cross-test-ssh.sh (env_blacklist): Remove variable. (help): Do not mention environment variables. Mention --timeoutfactor option. (timeoutfactor): New variable. (blacklist_exports): Remove function. (exports): Remove variable. (command): Do not include ${exports}. * manual/install.texi (Configuring and compiling): Do not mention test wrappers preserving environment variables. Mention that last assignment to a variable must take precedence. * INSTALL: Regenerated. * benchtests/Makefile (run-bench): Use $(run-program-env). * catgets/Makefile ($(objpfx)test1.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test2.cat): Do not specify environment variables explicitly. ($(objpfx)de/libc.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test-gencat.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)sample.SJIS.cat): Do not specify environment variables explicitly. * catgets/test-gencat.sh: Use test_program_cmd_before_env, run_program_env and test_program_cmd_after_env arguments. * elf/Makefile ($(objpfx)tst-pathopt.out): Use $(run-program-env). * elf/tst-pathopt.sh: Use run_program_env argument. * iconvdata/Makefile ($(objpfx)iconv-test.out): Use $(test-wrapper-env) and $(run-program-env). * iconvdata/run-iconv-test.sh: Use test_wrapper_env and run_program_env arguments. * iconvdata/tst-table.sh: Do not set GCONV_PATH explicitly. * intl/Makefile ($(objpfx)tst-gettext.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-gettext2.out): Likewise. * intl/tst-gettext.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * intl/tst-gettext2.sh: Likewise. * intl/tst-gettext4.sh: Do not set environment variables explicitly. * intl/tst-gettext6.sh: Likewise. * intl/tst-translit.sh: Likewise. * malloc/Makefile ($(objpfx)tst-mtrace.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * malloc/tst-mtrace.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * math/Makefile (run-regen-ulps): Use $(run-program-env). * nptl/Makefile ($(objpfx)tst-tls6.out): Use $(run-program-env). * nptl/tst-tls6.sh: Use run_program_env argument. Set LANG=C explicitly with each use of ${test_wrapper_env}. * posix/Makefile ($(objpfx)wordexp-tst.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * posix/tst-getconf.sh: Do not set environment variables explicitly. * posix/wordexp-tst.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * stdio-common/tst-printf.sh: Do not set environment variables explicitly. * stdlib/Makefile ($(objpfx)tst-fmtmsg.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * stdlib/tst-fmtmsg.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. Split $test calls into $test_pre and $test. * timezone/Makefile (build-testdata): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). localedata/ChangeLog: * Makefile ($(addprefix $(objpfx),$(CTYPE_FILES))): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)sort-test.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-fmon.out): Use $(run-program-prefix-before-env), $(run-program-env) and $(run-program-prefix-after-env). ($(objpfx)tst-locale.out): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)tst-trans.out): Use $(run-program-prefix-before-env), $(run-program-env), $(run-program-prefix-after-env), $(test-program-prefix-before-env) and $(test-program-prefix-after-env). ($(objpfx)tst-ctype.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)tst-wctype.out): Likewise. ($(objpfx)tst-langinfo.out): Likewise. ($(objpfx)tst-langinfo-static.out): Likewise. * gen-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * sort-test.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * tst-ctype.sh: Use tst_ctype_before_env, run_program_env and tst_ctype_after_env arguments. * tst-fmon.sh: Use run_program_prefix_before_env, run_program_env and run_program_prefix_after_env arguments. * tst-langinfo.sh: Use tst_langinfo_before_env, run_program_env and tst_langinfo_after_env arguments. * tst-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * tst-mbswcs.sh: Do not set environment variables explicitly. * tst-numeric.sh: Likewise. * tst-rpmatch.sh: Likewise. * tst-trans.sh: Use run_program_prefix_before_env, run_program_env, run_program_prefix_after_env, test_program_prefix_before_env and test_program_prefix_after_env arguments. * tst-wctype.sh: Use tst_wctype_before_env, run_program_env and tst_wctype_after_env arguments.
2014-06-07 06:19:27 +08:00
working directory and the standard input, output and error file
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descriptors. If 'TEST-WRAPPER env' will not work to run a program with
environment variables set, then 'test-wrapper-env' must be set to a
Don't require test wrappers to preserve environment variables, use more consistent environment. One wart in the original support for test wrappers for cross testing, as noted in <https://sourceware.org/ml/libc-alpha/2012-10/msg00722.html>, is the requirement for test wrappers to pass a poorly-defined set of environment variables from the build system to the system running the glibc under test. Although some variables are passed explicitly via $(test-wrapper-env), including LD_* variables that simply can't be passed implicitly because of the side effects they'd have on the build system's dynamic linker, others are passed implicitly, including variables such as GCONV_PATH and LOCPATH that could potentially affect the build system's libc (so effectively relying on any such effects not breaking the wrappers). In addition, the code in cross-test-ssh.sh for preserving environment variables is fragile (it depends on how bash formats a list of exported variables, and could well break for multi-line variable definitions where the contents contain things looking like other variable definitions). This patch moves to explicitly passing environment variables via $(test-wrapper-env). Makefile variables that previously used $(test-wrapper) are split up into -before-env and -after-env parts that can be passed separately to the various .sh files used in testing, so those files can then insert environment settings between the two parts. The common default environment settings in make-test-out are made into a separate makefile variable that can also be passed to scripts, rather than many scripts duplicating those settings (for testing an installed glibc, it is desirable to have the GCONV_PATH setting on just one place, so just that one place needs to support it pointing to an installed sysroot instead of the build tree). The default settings are included in the variables such as $(test-program-prefix), so that if tests do not need any non-default settings they can continue to use single variables rather than the split-up variables. Although this patch cleans up LC_ALL=C settings (that being part of the common defaults), various LANG=C and LANGUAGE=C settings remain. Those are generally unnecessary and I propose a subsequent cleanup to remove them. LC_ALL takes precedence over LANG, and while LANGUAGE takes precedence over LC_ALL, it only does so for settings other than LC_ALL=C. So LC_ALL=C on its own is sufficient to ensure the C locale, and anything that gets LC_ALL=C does not need the other settings. While preparing this patch I noticed some tests with .sh files that appeared to do nothing beyond what the generic makefile support for tests can do (localedata/tst-wctype.sh - the makefiles support -ENV variables and .input files - and localedata/tst-mbswcs.sh - just runs five tests that could be run individually from the makefile). So I propose another subsequent cleanup to move those to using the generic support instead of special .sh files. Tested x86_64 (native) and powerpc32 (cross). * Makeconfig (run-program-env): New variable. (run-program-prefix-before-env): Likewise. (run-program-prefix-after-env): Likewise. (run-program-prefix): Define in terms of new variables. (built-program-cmd-before-env): New variable. (built-program-cmd-after-env): Likewise. (built-program-cmd): Define in terms of new variables. (test-program-prefix-before-env): New variable. (test-program-prefix-after-env): Likewise. (test-program-prefix): Define in terms of new variables. (test-program-cmd-before-env): New variable. (test-program-cmd-after-env): Likewise. (test-program-cmd): Define in terms of new variables. * Rules (make-test-out): Use $(run-program-env). * scripts/cross-test-ssh.sh (env_blacklist): Remove variable. (help): Do not mention environment variables. Mention --timeoutfactor option. (timeoutfactor): New variable. (blacklist_exports): Remove function. (exports): Remove variable. (command): Do not include ${exports}. * manual/install.texi (Configuring and compiling): Do not mention test wrappers preserving environment variables. Mention that last assignment to a variable must take precedence. * INSTALL: Regenerated. * benchtests/Makefile (run-bench): Use $(run-program-env). * catgets/Makefile ($(objpfx)test1.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test2.cat): Do not specify environment variables explicitly. ($(objpfx)de/libc.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test-gencat.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)sample.SJIS.cat): Do not specify environment variables explicitly. * catgets/test-gencat.sh: Use test_program_cmd_before_env, run_program_env and test_program_cmd_after_env arguments. * elf/Makefile ($(objpfx)tst-pathopt.out): Use $(run-program-env). * elf/tst-pathopt.sh: Use run_program_env argument. * iconvdata/Makefile ($(objpfx)iconv-test.out): Use $(test-wrapper-env) and $(run-program-env). * iconvdata/run-iconv-test.sh: Use test_wrapper_env and run_program_env arguments. * iconvdata/tst-table.sh: Do not set GCONV_PATH explicitly. * intl/Makefile ($(objpfx)tst-gettext.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-gettext2.out): Likewise. * intl/tst-gettext.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * intl/tst-gettext2.sh: Likewise. * intl/tst-gettext4.sh: Do not set environment variables explicitly. * intl/tst-gettext6.sh: Likewise. * intl/tst-translit.sh: Likewise. * malloc/Makefile ($(objpfx)tst-mtrace.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * malloc/tst-mtrace.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * math/Makefile (run-regen-ulps): Use $(run-program-env). * nptl/Makefile ($(objpfx)tst-tls6.out): Use $(run-program-env). * nptl/tst-tls6.sh: Use run_program_env argument. Set LANG=C explicitly with each use of ${test_wrapper_env}. * posix/Makefile ($(objpfx)wordexp-tst.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * posix/tst-getconf.sh: Do not set environment variables explicitly. * posix/wordexp-tst.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * stdio-common/tst-printf.sh: Do not set environment variables explicitly. * stdlib/Makefile ($(objpfx)tst-fmtmsg.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * stdlib/tst-fmtmsg.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. Split $test calls into $test_pre and $test. * timezone/Makefile (build-testdata): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). localedata/ChangeLog: * Makefile ($(addprefix $(objpfx),$(CTYPE_FILES))): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)sort-test.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-fmon.out): Use $(run-program-prefix-before-env), $(run-program-env) and $(run-program-prefix-after-env). ($(objpfx)tst-locale.out): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)tst-trans.out): Use $(run-program-prefix-before-env), $(run-program-env), $(run-program-prefix-after-env), $(test-program-prefix-before-env) and $(test-program-prefix-after-env). ($(objpfx)tst-ctype.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)tst-wctype.out): Likewise. ($(objpfx)tst-langinfo.out): Likewise. ($(objpfx)tst-langinfo-static.out): Likewise. * gen-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * sort-test.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * tst-ctype.sh: Use tst_ctype_before_env, run_program_env and tst_ctype_after_env arguments. * tst-fmon.sh: Use run_program_prefix_before_env, run_program_env and run_program_prefix_after_env arguments. * tst-langinfo.sh: Use tst_langinfo_before_env, run_program_env and tst_langinfo_after_env arguments. * tst-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * tst-mbswcs.sh: Do not set environment variables explicitly. * tst-numeric.sh: Likewise. * tst-rpmatch.sh: Likewise. * tst-trans.sh: Use run_program_prefix_before_env, run_program_env, run_program_prefix_after_env, test_program_prefix_before_env and test_program_prefix_after_env arguments. * tst-wctype.sh: Use tst_wctype_before_env, run_program_env and tst_wctype_after_env arguments.
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program that runs a newly built program with environment variable
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assignments in effect, those assignments being specified as 'VAR=VALUE'
Don't require test wrappers to preserve environment variables, use more consistent environment. One wart in the original support for test wrappers for cross testing, as noted in <https://sourceware.org/ml/libc-alpha/2012-10/msg00722.html>, is the requirement for test wrappers to pass a poorly-defined set of environment variables from the build system to the system running the glibc under test. Although some variables are passed explicitly via $(test-wrapper-env), including LD_* variables that simply can't be passed implicitly because of the side effects they'd have on the build system's dynamic linker, others are passed implicitly, including variables such as GCONV_PATH and LOCPATH that could potentially affect the build system's libc (so effectively relying on any such effects not breaking the wrappers). In addition, the code in cross-test-ssh.sh for preserving environment variables is fragile (it depends on how bash formats a list of exported variables, and could well break for multi-line variable definitions where the contents contain things looking like other variable definitions). This patch moves to explicitly passing environment variables via $(test-wrapper-env). Makefile variables that previously used $(test-wrapper) are split up into -before-env and -after-env parts that can be passed separately to the various .sh files used in testing, so those files can then insert environment settings between the two parts. The common default environment settings in make-test-out are made into a separate makefile variable that can also be passed to scripts, rather than many scripts duplicating those settings (for testing an installed glibc, it is desirable to have the GCONV_PATH setting on just one place, so just that one place needs to support it pointing to an installed sysroot instead of the build tree). The default settings are included in the variables such as $(test-program-prefix), so that if tests do not need any non-default settings they can continue to use single variables rather than the split-up variables. Although this patch cleans up LC_ALL=C settings (that being part of the common defaults), various LANG=C and LANGUAGE=C settings remain. Those are generally unnecessary and I propose a subsequent cleanup to remove them. LC_ALL takes precedence over LANG, and while LANGUAGE takes precedence over LC_ALL, it only does so for settings other than LC_ALL=C. So LC_ALL=C on its own is sufficient to ensure the C locale, and anything that gets LC_ALL=C does not need the other settings. While preparing this patch I noticed some tests with .sh files that appeared to do nothing beyond what the generic makefile support for tests can do (localedata/tst-wctype.sh - the makefiles support -ENV variables and .input files - and localedata/tst-mbswcs.sh - just runs five tests that could be run individually from the makefile). So I propose another subsequent cleanup to move those to using the generic support instead of special .sh files. Tested x86_64 (native) and powerpc32 (cross). * Makeconfig (run-program-env): New variable. (run-program-prefix-before-env): Likewise. (run-program-prefix-after-env): Likewise. (run-program-prefix): Define in terms of new variables. (built-program-cmd-before-env): New variable. (built-program-cmd-after-env): Likewise. (built-program-cmd): Define in terms of new variables. (test-program-prefix-before-env): New variable. (test-program-prefix-after-env): Likewise. (test-program-prefix): Define in terms of new variables. (test-program-cmd-before-env): New variable. (test-program-cmd-after-env): Likewise. (test-program-cmd): Define in terms of new variables. * Rules (make-test-out): Use $(run-program-env). * scripts/cross-test-ssh.sh (env_blacklist): Remove variable. (help): Do not mention environment variables. Mention --timeoutfactor option. (timeoutfactor): New variable. (blacklist_exports): Remove function. (exports): Remove variable. (command): Do not include ${exports}. * manual/install.texi (Configuring and compiling): Do not mention test wrappers preserving environment variables. Mention that last assignment to a variable must take precedence. * INSTALL: Regenerated. * benchtests/Makefile (run-bench): Use $(run-program-env). * catgets/Makefile ($(objpfx)test1.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test2.cat): Do not specify environment variables explicitly. ($(objpfx)de/libc.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test-gencat.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)sample.SJIS.cat): Do not specify environment variables explicitly. * catgets/test-gencat.sh: Use test_program_cmd_before_env, run_program_env and test_program_cmd_after_env arguments. * elf/Makefile ($(objpfx)tst-pathopt.out): Use $(run-program-env). * elf/tst-pathopt.sh: Use run_program_env argument. * iconvdata/Makefile ($(objpfx)iconv-test.out): Use $(test-wrapper-env) and $(run-program-env). * iconvdata/run-iconv-test.sh: Use test_wrapper_env and run_program_env arguments. * iconvdata/tst-table.sh: Do not set GCONV_PATH explicitly. * intl/Makefile ($(objpfx)tst-gettext.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-gettext2.out): Likewise. * intl/tst-gettext.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * intl/tst-gettext2.sh: Likewise. * intl/tst-gettext4.sh: Do not set environment variables explicitly. * intl/tst-gettext6.sh: Likewise. * intl/tst-translit.sh: Likewise. * malloc/Makefile ($(objpfx)tst-mtrace.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * malloc/tst-mtrace.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * math/Makefile (run-regen-ulps): Use $(run-program-env). * nptl/Makefile ($(objpfx)tst-tls6.out): Use $(run-program-env). * nptl/tst-tls6.sh: Use run_program_env argument. Set LANG=C explicitly with each use of ${test_wrapper_env}. * posix/Makefile ($(objpfx)wordexp-tst.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * posix/tst-getconf.sh: Do not set environment variables explicitly. * posix/wordexp-tst.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * stdio-common/tst-printf.sh: Do not set environment variables explicitly. * stdlib/Makefile ($(objpfx)tst-fmtmsg.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * stdlib/tst-fmtmsg.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. Split $test calls into $test_pre and $test. * timezone/Makefile (build-testdata): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). localedata/ChangeLog: * Makefile ($(addprefix $(objpfx),$(CTYPE_FILES))): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)sort-test.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-fmon.out): Use $(run-program-prefix-before-env), $(run-program-env) and $(run-program-prefix-after-env). ($(objpfx)tst-locale.out): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)tst-trans.out): Use $(run-program-prefix-before-env), $(run-program-env), $(run-program-prefix-after-env), $(test-program-prefix-before-env) and $(test-program-prefix-after-env). ($(objpfx)tst-ctype.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)tst-wctype.out): Likewise. ($(objpfx)tst-langinfo.out): Likewise. ($(objpfx)tst-langinfo-static.out): Likewise. * gen-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * sort-test.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * tst-ctype.sh: Use tst_ctype_before_env, run_program_env and tst_ctype_after_env arguments. * tst-fmon.sh: Use run_program_prefix_before_env, run_program_env and run_program_prefix_after_env arguments. * tst-langinfo.sh: Use tst_langinfo_before_env, run_program_env and tst_langinfo_after_env arguments. * tst-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * tst-mbswcs.sh: Do not set environment variables explicitly. * tst-numeric.sh: Likewise. * tst-rpmatch.sh: Likewise. * tst-trans.sh: Use run_program_prefix_before_env, run_program_env, run_program_prefix_after_env, test_program_prefix_before_env and test_program_prefix_after_env arguments. * tst-wctype.sh: Use tst_wctype_before_env, run_program_env and tst_wctype_after_env arguments.
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before the name of the program to be run. If multiple assignments to
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the same variable are specified, the last assignment specified must take
precedence. Similarly, if 'TEST-WRAPPER env -i' will not work to run a
program with an environment completely empty of variables except those
directly assigned, then 'test-wrapper-env-only' must be set; its use has
the same syntax as 'test-wrapper-env', the only difference in its
semantics being starting with an empty set of environment variables
rather than the ambient set.
Installing the C Library
========================
To install the library and its header files, and the Info files of the
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manual, type 'make install'. This will build things, if necessary,
Remove redundant C locale settings. Various glibc build / install / test code has C locale settings that are redundant with LC_ALL=C. LC_ALL takes precedence over LANG, so anywhere that sets LC_ALL=C (explicitly, or through it being in the default environment for running tests) does not need to set LANG=C. LC_ALL=C also takes precedence over LANGUAGE, since 2001-01-02 Ulrich Drepper <drepper@redhat.com> * intl/dcigettext.c (guess_category_value): Rewrite so that LANGUAGE value is ignored if the selected locale is the C locale. * intl/tst-gettext.c: Set locale for above change. * intl/tst-translit.c: Likewise. and so settings of LANGUAGE=C are also redundant when LC_ALL=C is set. One test also had LC_ALL=C in its -ENV setting, although it's part of the default environment used for tests. This patch removes the redundant settings. It removes a suggestion in install.texi of setting LANGUAGE=C LC_ALL=C for "make install"; the Makefile.in target "install" already sets LC_ALL_C so there's no need for the user to set it (and nor should there be any need for the user to set it). If some build machine tool used by "make install" uses a version of libintl predating that 2001 change, and the user has LANGUAGE set, the removal of LANGUAGE=C from the Makefile.in "install" rule could in principle affect the user's installation. However, I don't think we need to be concerned about pre-2001 build tools. Tested x86_64. * Makefile (install): Don't set LANGUAGE. * Makefile.in (install): Likewise. * assert/Makefile (test-assert-ENV): Remove variable. (test-assert-perr-ENV): Likewise. * elf/Makefile (neededtest4-ENV): Likewise. * iconvdata/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Don't set LANGUAGE. * io/ftwtest-sh (LANG): Remove variable. * libio/Makefile (tst-widetext-ENV): Likewise. * manual/install.texi (Running make install): Don't refer to environment settings for make install. * INSTALL: Regenerated. * nptl/tst-tls6.sh: Don't set LANG. * posix/globtest.sh (LANG): Remove variable. * string/Makefile (tester-ENV): Likewise. (inl-tester-ENV): Likewise. (noinl-tester-ENV): Likewise. * sysdeps/s390/s390-64/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Don't set LANGUAGE. * timezone/Makefile (build-testdata): Use $(built-program-cmd) without explicit environment settings. localedata/ChangeLog: * tst-fmon.sh: Don't set LANGUAGE. * tst-locale.sh: Likewise.
2014-06-08 03:58:36 +08:00
before installing them; however, you should still compile everything
first. If you are installing the GNU C Library as your primary C
library, we recommend that you shut the system down to single-user mode
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first, and reboot afterward. This minimizes the risk of breaking things
when the library changes out from underneath.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
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'make install' will do the entire job of upgrading from a previous
installation of the GNU C Library version 2.x. There may sometimes be
headers left behind from the previous installation, but those are
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generally harmless. If you want to avoid leaving headers behind you can
do things in the following order.
2000-03-10 17:36:06 +08:00
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You must first build the library ('make'), optionally check it ('make
check'), switch the include directories and then install ('make
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install'). The steps must be done in this order. Not moving the
directory before install will result in an unusable mixture of header
files from both libraries, but configuring, building, and checking the
library requires the ability to compile and run programs against the old
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library. The new '/usr/include', after switching the include
directories and before installing the library should contain the Linux
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headers, but nothing else. If you do this, you will need to restore any
headers from libraries other than the GNU C Library yourself after
installing the library.
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You can install the GNU C Library somewhere other than where you
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configured it to go by setting the 'install_root' variable on the
command line for 'make install'. The value of this variable is
prepended to all the paths for installation. This is useful when
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setting up a chroot environment or preparing a binary distribution. The
directory should be specified with an absolute file name.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
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The GNU C Library includes a daemon called 'nscd', which you may or
may not want to run. 'nscd' caches name service lookups; it can
dramatically improve performance with NIS+, and may help with DNS as
well.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
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One auxiliary program, '/usr/libexec/pt_chown', is installed setuid
'root' if the '--enable-pt_chown' configuration option is used. This
program is invoked by the 'grantpt' function; it sets the permissions on
a pseudoterminal so it can be used by the calling process. If you are
using a Linux kernel with the 'devpts' filesystem enabled and mounted at
'/dev/pts', you don't need this program.
After installation you might want to configure the timezone and
locale installation of your system. The GNU C Library comes with a
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locale database which gets configured with 'localedef'. For example, to
set up a German locale with name 'de_DE', simply issue the command
'localedef -i de_DE -f ISO-8859-1 de_DE'. To configure all locales that
are supported by the GNU C Library, you can issue from your build
directory the command 'make localedata/install-locales'.
To configure the locally used timezone, set the 'TZ' environment
variable. The script 'tzselect' helps you to select the right value.
As an example, for Germany, 'tzselect' would tell you to use
'TZ='Europe/Berlin''. For a system wide installation (the given paths
are for an installation with '--prefix=/usr'), link the timezone file
which is in '/usr/share/zoneinfo' to the file '/etc/localtime'. For
Germany, you might execute 'ln -s /usr/share/zoneinfo/Europe/Berlin
/etc/localtime'.
Recommended Tools for Compilation
=================================
We recommend installing the following GNU tools before attempting to
build the GNU C Library:
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* GNU 'make' 3.79 or newer
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You need the latest version of GNU 'make'. Modifying the GNU C
Library to work with other 'make' programs would be so difficult
that we recommend you port GNU 'make' instead. *Really.* We
recommend GNU 'make' version 3.79. All earlier versions have
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
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severe bugs or lack features.
* GCC 4.6 or newer
2012-02-28 07:07:59 +08:00
GCC 4.6 or higher is required. In general it is recommended to use
the newest version of the compiler that is known to work for
building the GNU C Library, as newer compilers usually produce
better code. As of release time, GCC 4.9.2 is the newest compiler
verified to work to build the GNU C Library.
You can use whatever compiler you like to compile programs that use
the GNU C Library.
Check the FAQ for any special compiler issues on particular
platforms.
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* GNU 'binutils' 2.22 or later
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You must use GNU 'binutils' (as and ld) to build the GNU C Library.
No other assembler or linker has the necessary functionality at the
moment. As of release time, GNU 'binutils' 2.25 is the newest
verified to work to build the GNU C Library.
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* GNU 'texinfo' 4.7 or later
To correctly translate and install the Texinfo documentation you
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need this version of the 'texinfo' package. Earlier versions do
not understand all the tags used in the document, and the
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
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installation mechanism for the info files is not present or works
differently. As of release time, 'texinfo' 5.2 is the newest
verified to work to build the GNU C Library.
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* GNU 'awk' 3.1.2, or higher
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'awk' is used in several places to generate files. Some 'gawk'
extensions are used, including the 'asorti' function, which was
introduced in version 3.1.2 of 'gawk'.
* Perl 5
Perl is not required, but it is used if present to test the
installation. We may decide to use it elsewhere in the future.
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* GNU 'sed' 3.02 or newer
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'Sed' is used in several places to generate files. Most scripts
work with any version of 'sed'. The known exception is the script
'po2test.sed' in the 'intl' subdirectory which is used to generate
'msgs.h' for the test suite. This script works correctly only with
GNU 'sed' 3.02. If you like to run the test suite, you should
definitely upgrade 'sed'.
2000-03-10 17:36:06 +08:00
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If you change any of the 'configure.ac' files you will also need
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* GNU 'autoconf' 2.69 (exactly)
and if you change any of the message translation files you will need
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* GNU 'gettext' 0.10.36 or later
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If you wish to regenerate the 'yacc' parser code in the 'intl'
subdirectory you will need
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* GNU 'bison' 2.7 or later
You may also need these packages if you upgrade your source tree using
patches, although we try to avoid this.
Specific advice for GNU/Linux systems
=====================================
If you are installing the GNU C Library on GNU/Linux systems, you need
Increase minimum Linux kernel version to 2.6.32. This patch increases the minimum Linux kernel version for glibc to 2.6.32, as discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2014-01/msg00511.html>. This patch just does the minimal change to arch_minimum_kernel settings (and LIBC_LINUX_VERSION, which determines the minimum kernel headers version, as it doesn't make sense for that to be older than the minimum kernel that can be used at runtime). Followups would be expected to do, roughly and not necessarily precisely in this order: * Remove __LINUX_KERNEL_VERSION checks in kernel-features.h files where those checks are always true / always false for kernels 2.6.32 and above. * Otherwise simplify/improve conditionals in those files (for example, where defining once in the main file then undefining in architecture-specific files makes things clearer than having lots of separate definitions of the same macro), possibly fixing in the process cases where a macro should optimally have been defined for a given architecture but wasn't. (In the review in preparation for this version increase I checked what the right conditions should be for all macros in the main kernel-features.h whose definitions there would have been affected by the increase - but I only fixed that subset of the issues found where --enable-kernel=2.6.32 would have caused a kernel feature to be wrongly assumed to be present, not any cases where a feature is not assumed but could be assumed.) * Remove conditionals on __ASSUME_* where they can now be taken to be always-true, and the definitions when the macros are only used in Linux-specific files. * Split more architectures out of the main kernel-features.h (like ex-ports architectures), once various of the architecture conditionals there have been eliminated so the new architecture-specific files are no larger than actually necessary. Tested x86_64. 2014-03-27 Joseph Myers <joseph@codesourcery.com> [BZ #9894] * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Change to 2.6.32. (arch_minimum_kernel): Change all 2.6.16 settings to 2.6.32. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/microblaze/configure.ac: Remove file. * sysdeps/unix/sysv/linux/microblaze/configure: Likewise. * sysdeps/unix/sysv/linux/tile/configure.ac: Likewise. * sysdeps/unix/sysv/linux/tile/configure: Likewise. * README: Update reference to required Linux kernel version. * manual/install.texi (Linux): Update reference to required Linux kernel headers version. * INSTALL: Regenerated.
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to have the header files from a 2.6.32 or newer kernel around for
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reference. These headers must be installed using 'make
headers_install'; the headers present in the kernel source directory are
not suitable for direct use by the GNU C Library. You do not need to
use that kernel, just have its headers installed where the GNU C Library
can access them, referred to here as INSTALL-DIRECTORY. The easiest way
to do this is to unpack it in a directory such as
'/usr/src/linux-VERSION'. In that directory, run 'make headers_install
INSTALL_HDR_PATH=INSTALL-DIRECTORY'. Finally, configure the GNU C
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Library with the option '--with-headers=INSTALL-DIRECTORY/include'. Use
the most recent kernel you can get your hands on. (If you are
cross-compiling the GNU C Library, you need to specify
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'ARCH=ARCHITECTURE' in the 'make headers_install' command, where
ARCHITECTURE is the architecture name used by the Linux kernel, such as
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'x86' or 'powerpc'.)
After installing the GNU C Library, you may need to remove or rename
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directories such as '/usr/include/linux' and '/usr/include/asm', and
replace them with copies of directories such as 'linux' and 'asm' from
'INSTALL-DIRECTORY/include'. All directories present in
'INSTALL-DIRECTORY/include' should be copied, except that the GNU C
Library provides its own version of '/usr/include/scsi'; the files
provided by the kernel should be copied without replacing those provided
by the GNU C Library. The 'linux', 'asm' and 'asm-generic' directories
are required to compile programs using the GNU C Library; the other
directories describe interfaces to the kernel but are not required if
not compiling programs using those interfaces. You do not need to copy
kernel headers if you did not specify an alternate kernel header source
using '--with-headers'.
The Filesystem Hierarchy Standard for GNU/Linux systems expects some
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components of the GNU C Library installation to be in '/lib' and some in
'/usr/lib'. This is handled automatically if you configure the GNU C
Library with '--prefix=/usr'. If you set some other prefix or allow it
to default to '/usr/local', then all the components are installed there.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
Reporting Bugs
==============
There are probably bugs in the GNU C Library. There are certainly
errors and omissions in this manual. If you report them, they will get
fixed. If you don't, no one will ever know about them and they will
remain unfixed for all eternity, if not longer.
It is a good idea to verify that the problem has not already been
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reported. Bugs are documented in two places: The file 'BUGS' describes
a number of well known bugs and the central GNU C Library bug tracking
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system has a WWW interface at <http://sourceware.org/bugzilla/>. The
WWW interface gives you access to open and closed reports. A closed
report normally includes a patch or a hint on solving the problem.
Update. 2002-03-23 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/brk.c (__curbrk): Declare. * sysdeps/generic/dl-brk.c: Add attribute_hidden to __curbrk. * sysdeps/generic/dl-sbrk.c: Likewise. * sysdeps/unix/arm/dl-brk.S: New file. * sysdeps/unix/bsd/hp/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/osf/alpha/dl-brk.S: New file. * sysdeps/unix/bsd/sun/m68k/dl-brk.S: New file. * sysdeps/unix/bsd/vax/dl-brk.S: New file. * sysdeps/unix/i386/dl-brk.S: New file. * sysdeps/unix/mips/dl-brk.S: New file. * sysdeps/unix/sparc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/alpha/dl-brk.S: New file. * sysdeps/unix/sysv/linux/ia64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/powerpc/dl-brk.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S: New file. * sysdeps/unix/sysv/linux/i386/dl-brk.c: Remove. * sysdeps/unix/sysv/linux/i386/dl-sbrk.c: Remove. 2002-04-03 Andreas Schwab <schwab@suse.de> * Makefile (headers): Add gnu/lib-names.h here instead of install-others. ($(inst_includedir)/gnu/lib-names.h): Remove explicit installation rule. (install-headers): Add dependency on install-headers-nosubdir. * stdio-common/Makefile (headers): Add bits/stdio_lim.h here instead of install-others. ($(inst_includedir)/bits/stdio_lim.h): Remove explicit installation rule. 2002-04-05 Ulrich Drepper <drepper@redhat.com> * manual/users.tex (Enable/Disable Setuid): Fix typo in example. Reported by Sam Roberts <sroberts@uniserve.com>. 2002-04-03 Jakub Jelinek <jakub@redhat.com> * elf/do-rel.h (elf_dynamic_do_rel): Skip relative relocs if l_addr == 0 and ELF_MACHINE_REL_RELATIVE. * sysdeps/alpha/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. * sysdeps/ia64/dl-machine.h (ELF_MACHINE_REL_RELATIVE): Define. 2002-04-03 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/dl-machine.h (TRAMPOLINE_TEMPLATE): Add unwind info. (RTLD_START): Ditto. (__ia64_init_bootstrap_fdesc_table): Insert stop bit to avoid RAW dependency violation.
2002-04-06 09:45:15 +08:00
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To report a bug, first you must find it. With any luck, this will be
the hard part. Once you've found a bug, make sure it's really a bug. A
good way to do this is to see if the GNU C Library behaves the same way
some other C library does. If so, probably you are wrong and the
libraries are right (but not necessarily). If not, one of the libraries
is probably wrong. It might not be the GNU C Library. Many historical
Unix C libraries permit things that we don't, such as closing a file
twice.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
If you think you have found some way in which the GNU C Library does
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-10 02:21:06 +08:00
not conform to the ISO and POSIX standards (*note Standards and
2000-03-10 17:36:06 +08:00
Portability::), that is definitely a bug. Report it!
Once you're sure you've found a bug, try to narrow it down to the
smallest test case that reproduces the problem. In the case of a C
library, you really only need to narrow it down to one library function
call, if possible. This should not be too difficult.
The final step when you have a simple test case is to report the bug.
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Do this at <http://www.gnu.org/software/libc/bugs.html>.
If you are not sure how a function should behave, and this manual
doesn't tell you, that's a bug in the manual. Report that too! If the
function's behavior disagrees with the manual, then either the library
or the manual has a bug, so report the disagreement. If you find any
errors or omissions in this manual, please report them to the bug
database. If you refer to specific sections of the manual, please
include the section names for easier identification.